JP6423607B2 - Display device for machine tool motor load - Google Patents

Description

  The present invention relates to a machine tool equipped with an NC device, and more particularly to a device for displaying an operating state of an NC lathe equipped with a plurality of tool rests on a display of an operation panel.

  NC machine tools continuously and automatically perform a series of processing from raw materials to finished products according to the processing procedure described in the processing program. In addition to this automatic operation mode, the process described in the processing program is performed as a process. A process-specific operation mode, a manual operation mode, or the like performed from another or mid-process is also prepared.

  When rewriting a machining program to improve productivity or quality, or when machining a new product, check whether the machining program is written correctly, or due to interference between tools and workpieces, overload, etc. In order to avoid an abnormal stop or alarm, it is essential to perform test processing, and the operation mode for each process is used in this test processing.

  For this reason, the display and operation panel of the machine tool have a gauge indicating the load value of the feed motor and spindle motor for each axis of each tool post, a gauge indicating the override value, a lamp indicating the operation mode, and a tool post. A lamp that indicates the turret status indicating the positional relationship, a start-up ready lamp that indicates whether the automatic continuous operation start conditions are in place, and an index preparation that indicates whether tool indexing is possible Lamps are provided.

  On the display screen of the machine tool, a screen for displaying the display element indicating the operation state as described above is prepared. However, the conventional display elements that indicate the operation status are in the form of a table that displays numerical values and symbols indicating availability, or display lamps arranged on the display screen or operation panel. It is difficult to grasp the display area, and the area occupied by the display elements on the display screen is large. Therefore, other display elements cannot be displayed unless the screen is switched, resulting in poor visibility and listing. There was a problem.

  For example, the conventional display element of the feed load of the tool post displays the load of the feed motor of each axis for each tool post in a bar graph format, and a dedicated display screen is provided for each tool post. Therefore, it is difficult for a machine tool equipped with multiple turrets to grasp the load state of the entire turret at a time, and the override value and the load on the turret feed motor are checked at the same time. I couldn't.

  An object of the present invention is to provide a machine tool equipped with a display screen having an excellent visibility and design that allows an operator to always grasp the operating state of the machine at a glance, and achieves this object. It is an object to obtain a motor load display device.

A general NC device is provided with a screen for numerically displaying the motor load for each tool post, and a screen switching program for switching to the load display screen of the tool post by selecting the tool post is prepared.

The display device for the motor load of the machine tool according to the present invention displays the load of the feed motor, spindle motor, spindle feed motor, tool motor, etc. of each direction of the tool post in which the load fluctuates due to fluctuations in the cutting reaction force or cutting speed. The circular or polygonal display element 2 to be displayed is displayed in the constant display area 11 provided on the display 1 of the operation panel 14.

The display element 2 is provided with a plurality of display units 21 (21X to 21M) by equally dividing the polygonal or circular area (in the case of a polygon, divided by the same number as the number of corners), and a gauge 22 in each display unit. The state of the display target assigned to each display unit is displayed by the expansion / contraction of the radial direction (22X to 22M) and the change in display color.

Here, the gauge is a pixel that expands and contracts according to a numerical value indicating the state of a corresponding display target, and corresponds to a mercury column of a mercury thermometer. The display target is, for example, a feed motor, a spindle motor, a tool motor load, a load state, an operation state, or the like of each axis for the tool post. As for the display elements related to the feed load of the tool post, one display element is assigned to each tool post.

In a machine tool provided with a plurality of tool rests, the display elements 2 (2a, 2b, 2c) are displayed in the same number and arrangement manner as the number and arrangement manner of the tool rests. Each display element 2 displays the load of the plurality of motors related to the tool post 65 corresponding to the arrangement position with a gauge 22 that expands and contracts in the radial direction from the center side of the display element 2. These gauges 22 can display the corresponding motor load state, for example, no load or overload, in a luminescent color.

If display de I spray panel is a touch panel, there are display element 2, when tapped, start screen switching program that displays a numerical value screen corresponding to the display element on the display, display numbers display screen Ru is.

  According to the motor load display element 2 in the display device of the present invention, it is possible to grasp at a glance the motor load and the operating state of the corresponding tool post in each axial direction with a single display element. Can also know immediately. Since the display element 2 occupies a small area on the display screen and the display element 2 can be arranged according to the arrangement of the actual tool post, the load state of all the tool posts can be grasped at a glance and intuitively.

Furthermore, it is possible to confirm the detailed figures motor load by simply tapping the tool rest of the display elements that correspond.

  According to the present invention, the display of the motor load on the display screen can be displayed in a small area with excellent visibility and design. Since the area of the display element 2 is small, it is possible to always display regardless of the screen switching, and since it can be displayed together with other display elements, a plurality of types of operation states can be displayed simultaneously. The listability can be improved, and the operator can easily grasp the overall state of the machine.

Schematic diagram showing an example of a machine tool to which the present invention is applied The figure which shows the display screen of the machine tool of FIG. Diagram showing arrangement of motor load display elements Diagram showing details of motor load display element Block diagram of control system Flow chart showing control procedure Illustration of gauge drawing of motor load display element Gauge drawing flowchart Lamp drawing procedure flowchart Figure showing an example of a numerical display screen for motor load

  Next, an embodiment of the present invention will be described by taking a two-spindle opposed lathe equipped with three turret tool rests as an example. The lathe according to the embodiment includes left and right main spindles 61 and 62 that are opposed to each other on the main spindle axis, and work chucks 63 and 64 that are mounted on opposite ends of the main spindles that are supported by the main spindles. One turret 65c is provided on the front lower side when viewed from the operator across the axis a, and two turret turrets 65a and 65b are provided on the upper rear side. One of the headstocks (the right headstock) 62 can move forward and backward toward the other (the left headstock) 61, and approaches and separates toward the left spindle when transferring the workpiece between the two spindles. The B-axis referred to in this specification is a movement axis of the right spindle stock 62 in the spindle axis direction.

  The tool post 65 (65a, 65b, 65c) arranged above and below the spindle axis moves in the X-axis direction that is the cutting direction of the tool, the Z-axis direction that is parallel to the spindle axis, and the Y-axis direction that is perpendicular to the drawing sheet. Positioning is possible, rotary tools such as drills and milling cutters can be mounted, and a tool drive motor that drives these rotary tools is mounted.

  FIG. 2 is a diagram showing a display screen provided on the operation panel of the machine tool. The display 1 is divided into a constant display area 11 in which display elements for operating states are arranged and a main area 12 for switching and displaying various screens. The constant display area 11 includes a motor load display element 2 (2a, 2b, 2c) for displaying a motor load related to machining such as a feed motor, a spindle motor, and a tool motor in each axial direction of the tool post 65, and an override. A value display element 4, an origin state display element 3 (3a, 3b, 3c) for displaying the origin state of each tool post, and an animation display element 5 for displaying an animation of the operation of the machine are arranged.

  The motor load display element 2 and the origin state display element 3 are provided with one display element for each tool post, and the display element corresponding to the lower tool post is intermediate between the display elements corresponding to the two upper tool posts. In the lower position, that is, in the same arrangement manner as the arrangement manner of the tool post 65 in the actual machine.

  Details of the motor load display element are shown in FIGS. The motor load display element 2 has a hexagonal shape and is partitioned into six gauge display portions 21 (21X to 21M) that are divided into six equal parts. In each gauge display portion, X, Z, Y corresponding to the feed axis of the tool post, B corresponding to the feed axis of the right spindle base 62, spindle motor C, and tool motor M are displayed.

  The gauge display portions of the spindle motor C of the upper left and right display elements 2a and 2b display the loads of the respective spindle motors. The lower tool post 65c processes the workpiece on either side gripped by the left and right spindles as necessary, so when processing the left workpiece, the left spindle motor is used. The display is switched to the spindle motor.

  Each gauge display unit 21 displays the load state of the corresponding motor as a gauge 22 (22X to 22M) that expands and contracts in the radial direction with the inner diameter side as the base end. The gauge 22 of each display is displayed in green when the motor load is 0 to 100%, yellow when it exceeds 100%, and red when it exceeds 120%. I am trying to warn you. That is, normal, warning, and abnormal states of the motor load state are displayed by the green, yellow, and red of the gauge.

  Further, a hexagonal ring-shaped operation state display lamp portion 23 is provided on the outer periphery of the motor load display element 2. This operation status display lamp unit 23 is green when the corresponding tool post is in the automatic operation mode, white when it is in the operation mode by process, and when the operation is continued but some warning is given. Is yellow, and when the operation stops due to an abnormality, it emits red light so that the operator can grasp the operation state at a glance.

A touch panel is generally used as a display panel of a machine tool. When such a touch panel is used, when the display element 2 is tapped, the main area is conventionally used as shown in FIG. to switch to a numeric display screen of a motor load. On the numerical display screen, the motor load for each axis is displayed in a bar graph format, and the load ratio is also displayed numerically. Therefore, if the motor load display element 2 is used as an icon for starting a program for switching to a numerical display screen, the motor load display element 2 of the corresponding tool post may be tapped when it is desired to know the details of the motor load numerically. .

  FIG. 5 is a block diagram of hardware for implementing the present invention. The NC device that controls the machine tool 6 includes an NC unit 17 and a PC unit 15, and exchanges data via an interface I / F. The machining program and machine specifications are set in the NC unit 17. In the figure, the NC part is drawn on the machine side and the PC part is drawn on the operation panel side, but they are not necessarily installed separately.

  The operation panel 14 is provided with a display 1 and various dial switches, display lamps and the like not shown. The PC unit 15 includes a screen display application 16, and the motor load display element 2 is displayed on the display 1 by a motor load display program registered in this part.

  6, 8 and 9 are flowcharts of the motor load display program. FIG. 6 is a diagram showing the overall flow, FIG. 8 is a diagram showing details of gauge display of a motor load, and FIG. 9 is a diagram showing details of lamp display showing an operation state.

  In the constant acquisition step 100 of FIG. 6, the number n of the tool rests 65 provided in the machine, the origin coordinates O of the display elements corresponding to the respective tool rests, and the display object (here, the motor) to be displayed on each display element. A number m is set. The number n of turrets and the number m of motors can also be acquired from the NC unit. Further, in the constant acquisition step 100, the radius Ri of the inner circle Si, the radius Ro of the outer circle So, and the width e of the ring light emitting portion of the display element are set as constants.

  With these constants set, the load ratio of the i (i = 1 to 6) -th motor in a predetermined order (in this example, the order of X, Z, C, Y, B, M) is acquired. Then, the display area of the motor gauge can be calculated as follows.

  That is, referring to FIG. 7, assuming that the gauge of i = 1 is displayed right above, the center line L of the gauge 22 is a radial direction passing through the origin O of θ = (360 / m) × (i−1). It becomes the line. The center point P of the base end of the gauge 22 is an intersection point where the line L and the circle Si having the radius Ri intersect, and the center point Q on the distal end side of the gauge 22 is the intersection point of the center line L and the circle So having the radius Ro and the intersection point P. The difference between the x and y coordinates is multiplied by the load ratio, and the x coordinate value and y coordinate value of the intersection P at the base end are added to the value to obtain the coordinate point Q.

  Then, rays U and V orthogonal to the center line L through the points P and Q, and a radiation with an angle θ− (360/2 m) measured in the same direction as θ passing through the center O and θ + (360/2 m) The trapezoidal region surrounded by the intersections t, u, v, and w with the radiation of the above becomes the display region of the gauge 22. If a gap is to be displayed between adjacent gauges, the points t to w are moved inward along the orthogonal lines U and V by the same dimension as the four points in the display area. .

  Further, the hexagonal ring-shaped ramp portion 23 provided outside the gauge display portion can be calculated as a region between a regular n-gon circumscribing the outer circumference circle So and a regular n-gon circumscribing a circle of radius Ro + e.

  The gauge 22 and the lamp unit 23 are displayed by causing the light emitting elements in the area thus obtained to emit light with a specified color.

  After acquiring necessary constants in the constant acquisition step 100, the processing of steps 101 to 105 is performed for each tool post, and the processing of steps 102 to 104 is performed for each display target (motor load) of each tool post. The number of display elements 2 corresponding to the number of tool post shown in 3 can be displayed.

  In FIG. 8 showing the details of the gauge drawing step 110, the drawing area calculation step 111 is a step of calculating the display area of the gauge 22 by the above-described calculation, and steps 112 to 116 are the obtained load ratios of 100% and 120%. This is a step of changing the emission color of the gauge 22 to red, yellow and green at the boundary.

  Further, in FIG. 9 showing the details of the lamp display step 120 indicating the operation state, steps 121 to 129 indicate whether the alarm signal of the NC unit 17 is ON, whether the warning signal is ON, The lamp portion 23 provided on the outer peripheral portion of the display element 2 depending on whether the stop signal is ON (ON in the process-specific operation mode) and whether the automatic continuous operation signal is ON (ON during automatic operation). Is executed by selecting whether to light up in red, yellow, white or green.

  By performing the above steps 101 to 105 at short time intervals, a polygonal or circular display element 2 for each tool post is displayed on the display 1 while updating the load state and operation state of the motor of the machine tool. can do.

DESCRIPTION OF SYMBOLS 1 Display 2 (2a, 2b, 2c) Motor load display element 11 Constant display area 14 Operation panel 21 (21X-21M) Display part 22 (22X-22M) Gauge 23 Lamp part 65 Tool post

Claims (1)

Motor load display device for machine tools provided with a numerical display screen for each turret on the display of the operation panel whose panel is a touch panel for the load of the motor whose load fluctuates due to fluctuations in cutting reaction force or cutting speed In
A part of the display is provided with a constant display area that does not switch even if another area of the screen is switched, and the constant display area has the same number and arrangement form as the number and arrangement form of the tool rest of the machine tool , A display element for displaying with a gauge that expands and contracts the loads of the plurality of motors of the tool post corresponding to the arrangement position is arranged,
A display device of a motor load of a machine tool , wherein each of these display elements is a trigger button for starting a program for switching all or a part of the other area to the numerical display screen of the tool post corresponding to the arrangement position .

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